There is an updated pull request by Hoshpak against master on the void-packages repository

https://github.com/Hoshpak/void-packages thunderbird-68.2
https://github.com/void-linux/void-packages/pull/15785

[WIP] Thunderbird 68.2.0
None

A patch file from https://github.com/void-linux/void-packages/pull/15785.patch is attached